The British Geological Survey (BGS) has confirmed that a second earthquake measuring 2.1 magnitude hit on Sunday evening.
On Sunday evening at 11.20pm a tremor was felt in Bedfordshire which is thought to have been an aftershock from the 3.5 magnitude quake that struck on 8 September.
A BGS spokesman said, “The most recent event was over 100 times smaller than the event on September 8 in the same area.
“The occurrence of smaller events from other previous UK earthquakes is not unknown.
“The small event that occurred in Bedfordshire last night could have occurred because all the stress in the rocks was not relieved by the event on September 8 in the same area or it caused a slight change to the stress regime in that location.
“There is constant ongoing research in the academic world on the issue of aftershock occurrence.”
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